Improvement in enamelling ovens



2 Sheets-Sheet 1.

.V. KELLER. ENAMBLING OVEN.

No. 98,777. Patented Jan, 11,; 1870.

waited finite-5 strut tfyiicc.

Letters Patent N 98,77 7

, dated January 11, 1870.

IMPROVEMENT IN ENAMBLLING- OVENS.

The Schedule referred as in these Letters Patent and making part of thesane.

To all whom it may concern:

Be it knownthat I, Vroron Knnnnn, .of the city and county of Allegheny,and State of Pennsylvania,have

invented anew and useful Improvcment'in' Enamelling Ovens; and I dohereby declare that the following is a full, clear, and exactdescription thereof, reference being bad to the accompanying drawings,and to the lettersof reference marked thereon. The nature of myinvention consists in constructing an cnamelling-oven, so that the heatwill be equally distributed over the bottom and around the mui'l'ler orcrown of the oven, also in providing the oven with opcrating-gear, soarran ed, with relation to the oven, as to automatically open and closeits doors, and convey into and out ofit the articles to be dried, baked.or enamelled. v t

To enable others skilled in the art to'make and use ,my invention, Iwill struction and operation.

In the accom m-nying drawings, which form part of my speciiication--Figure 1, Sheet A, is a side and front elevation of my iml'n'ovement ineimmelling-ovens.

Figure 2 is a side and backelevation of the same;-

Fignre 3, Sheet 1}, is a longitudinal section of the same.

Figure 4 is an end view of the same.

Figure 5 is a transverse section of the oven when cut through at line yoflig. 1.'

Figure 6 is a transverse section of the oven, representing the upperpart of it removed, as indicated at line y of fig. 5.

In the accompanying drawings- A represents the walls of the oven.

'13 represents the fire-chambers, which-are provided each with a-flne,1, 2, and 3, from which radiates a series offlues, as'sho'wn at 5 infig. 6, Sheet B; .These.

lines 5' connect with the line 4, which surrounds the mufiler or crown Zof the oven A.

From the flue 4, lead three fines, as indicated HUG,

and are arranged, so that they arerona vertical line with the flues'l,2,'and 3, leading fromthe fire-chambers B, and are connected by'finesIOwit-h ,t-he flue x, which is connected to a suitable chimney or stack.

' The bottom 11 of the oven is formed of tiles made of fire clay, orother refractory material, and the 1nuf-- fler 01' crown Z of the ovenmay be formed of tile, brick, or iron, and may be made in one or morepieces, as indicuted at 12 in fig. 3 of Sheet B.

At each end of the oven A are arrangedframes G, which support thegearing which is used for operating the endless aprons PP, and openingand closing the doors 8 of the oven A.

Onthe bottom 11 of the oven; are two iron bars, R, which are heldtogether by cross-bars. These bars It proceed to describe its co'n- Jare used asguldes,-upon which the endless aprons P P travehaud hold theaprons up of!- the bottom 11,

tbrthepnrpose of preventing them from causing any dust to'arIse in theoven in their passage through it. The endless aprons P1 are arranged onpulleys D I I), and c, andtravelin opposite directions,and more throughthe oven at snitabletintn'als. v

To the door 8 of the oven, are attached rods or chains '7, which areconnected to the inner ends of levers m, which are pivoted on the shaftsof the pulleys e. To the outer ends of the levers are attached rods orchains n,.

the lower ends of which are attached to levers w, which are pivoted at9. a

The endless aprons P P'auddoors 8 are operated through-the medium of thegearing marked-Z 0 ts j k fg It i, and cone-pulleys B and C, theconstruction and arrangement of :which will be readily understood by theskill'nl mechanic.

The inovenlentsof the'endlessaprons and doors being dependent upon-thedriving or operating-gear,

"and as the. movements of the endless aprons'and-doors rof theoven mustbe-adjnsted to the kind of drying,

baking, japanning, or 'euamelling .to be done in the oven, therefore, Iwish'itclearly understood that I do not confine myself to any singlearrangement of the gear, or to the size or form of the pulleys andwheels used.

As the construction and arrangement of the several partsot' myimprovement, and the relation that the Jseveral parts bear to eachother, will'be readilynnder- .stood from the foregoing description, andby reference to the accompanying drawings,I will therefore proceed todescribe the operation of my improvement; which is as follows In theprocess oi'cnamelling the interior ofiron- *are, I have foundit to he ofgreatadvantage to use three ovens, constructed substantially as hereindescribed,

,two of the ovens to be provided each with a single endless apron, andarranging the lever for opening the door at one end of the oven, asindicated by the dotted i lines 13, so that the gearing at one end ofthe oven will open and closehboth doors at the desired time.

The levers in and 1? may be lengthened for obtaining greater leverage,as indicated bythe dotted lines 14,

thereby requiring less power to raise the doors, For enamelling iron, asstated, the three ovens should be arranged so as to be convenientfor-conveying the article to be enamelled from the ovens to theworkmen,and from one oven to the other. I ,7 The two single ovens, I use fordrying the coatings of the enamel on the ware,'and the third one, whichis the oneherein described and represented, I use for baking the enamelon theware. When the ware is coated with the enamellin'g-material, thevessels or articles are-placed on one of the endless aprons P.

Now, by turning the crank 'f, it will revolve the wheels f and g, whichwill revolve the cone-pulley C,

. which will, through the medium .of a belt, revolve the cone-pulley B,which will revolve the wheel h, which will revolve the wheel i, whichwill revolve the wheels 10,

shalt 15, and wheels 8 and-'t, which will revolve the section of awheel, J, which gears into the wheel f.

The revolving of the wheelt will also revolve thesec- J J, are arrangedcams'u, which are so arranged, with relation to the sections ofwheels JJ that the cams will press down the levers w, which, through the mediumof the rods or chains 11 and 7, and 'the levers on, will raise the doorsSof the oven A, and as soon asthe doors. begin to'rise, the sect-ions ofwheels-J J will commence to rotate the wheels. f and k,-which willrevolve the pulleys D and D until one of the endless aprons has carrieda vessel intothe oven, and the other has carried a vessel outof-theo'ven. The sections of wheels J J will,by this time, becomeunshlpped from the wheels f and 7t, and the motions of the apronsstopped, and the cam'su will also become unshipped from the levers 7c,and thereby allow the doors 8 of the oven to close by their own gravity,and thus will the revolving of the gear continue to act, and cause theendless aprons to travel, and the doors of the oven to open and close atsuitable intervals, suitable to the movements of the workmen formanipulating and-enainelling the wares or articles to be dried, baked,japanned, or enamelled.

' The heat from the fire-chambers B passes up through the dues 1, 2, and3, and from them through the fines 5, and passes into lines 4, and upthrough them, around the mrfiler or crown of the oven, into the fines 6,and

through them into lines 10 and x, and from flue a; into the chimney orstack.

It will readily be seen and understood, that an oven I constructed andprovided with the operating-gear, as

herein described,'ean be used for drying, baking crackem or bread,japanning tin or sheet-iron iva-re, as well as for enamelling ironwar e,by simply arranging the operating-gear so as to obtain that mot-ion ofthe parts which is best adapted to the works required of the oven.

Having thus described the nature,- eonstruction, ar-

rangement, and operation of my improvement in ensubstantially as hereindescribed, and for the purpose set forth.

vlc'roa KELLER.

Witnesses.

A. G. JOHNSTON, JAMES J. Jorms'rox.

